It will take a long time to get a complete answer but if you're refering to a metal dog bone, the consensus is to get rid of it. Too many injuries.

Dig through this: http://www.catsailor.com/forums/ubbthreads.php?ubb=showflat&Number=242364&page=2
As usual the subject varies but there is a lot that is relevant to dogbones.

Last edited by pgp; 01/22/12 12:34 PM.
Pete Pollard
Blade 702

'When you have a lot of things to do, it's best to get your nap out of the way first.